Grex 0.097" 5/8" Concrete T-Nails Galvanized & Heat Treated (Hardened) are designed to provide superior strength and durability for your concrete fastening needs. These nails are galvanized to resist corrosion and heat treated to ensure hardness, making them i for heavy-duty applications. Their precise 0.097" diameter and 5/8" length make them for securing materials firmly in place with confidence and reliability. Whether you are working on construction or renovation projects, these concrete T-nails excellent performance and longevity. Model Number: GTN97-15